ssh 远程连接慢的原因分析和处理方法之一

问题：ssh连接主机响应时间长

1.处理方法：

   [oldboy@ser200 scripts]$ ssh -p 20000 [email protected] -v
OpenSSH_4.3p2, OpenSSL 0.9.8e-fips-rhel5 01 Jul 2008
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Applying options for *
debug1: Connecting to 192.168.1.201 [192.168.1.201] port 20000.
debug1: Connection established.
debug1: identity file /home/oldboy/.ssh/identity type -1
debug1: identity file /home/oldboy/.ssh/id_rsa type -1
debug1: identity file /home/oldboy/.ssh/id_dsa type 2
debug1: loaded 3 keys
debug1: Remote protocol version 2.0, remote software version OpenSSH_4.3
debug1: match: OpenSSH_4.3 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_4.3
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Host '192.168.1.201' is known and matches the RSA host key.
debug1: Found key in /home/oldboy/.ssh/known_hosts:2
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: gssapi-with-mic
debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found---问题出在这

gssapi-with-mic 验证失败

debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found

debug1: Unspecified GSS failure.  Minor code may provide more information
No credentials cache found

失败后，使用密钥验证
debug1: Next authentication method: publickey
debug1: Trying private key: /home/oldboy/.ssh/identity
debug1: Trying private key: /home/oldboy/.ssh/id_rsa
debug1: Offering public key: /home/oldboy/.ssh/id_dsa
debug1: Authentications that can continue: publickey,gssapi-with-mic,password
debug1: Next authentication method: password

私钥验证失败，使用password密码验证方式

解决办法：以下操作是远程服务器上,提供sshd服务的，不是客户端机器。

  1.vi /etc/ssh/sshd_config

  2.GSSAPIAuthentication yes  ----》GSSAPIAuthentication no

  3./etc/init.d/sshd restart